CN201146627Y - Electric ballast without electrochemical capacitor - Google Patents
Electric ballast without electrochemical capacitor Download PDFInfo
- Publication number
- CN201146627Y CN201146627Y CNU2007201308566U CN200720130856U CN201146627Y CN 201146627 Y CN201146627 Y CN 201146627Y CN U2007201308566 U CNU2007201308566 U CN U2007201308566U CN 200720130856 U CN200720130856 U CN 200720130856U CN 201146627 Y CN201146627 Y CN 201146627Y
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- China
- Prior art keywords
- circuit
- electric ballast
- bridge rectifier
- electrolytic capacitor
- push
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
The utility model relates to an electronic ballast without electrolysis condenser which belongs to the technology field of switch power. The ballast includes a bridge rectification circuit which is connected in parallel with a push-pull circuit that is composed of a chasing current circuit and a switching tube. The chasing current circuit is used for extending the conduction angle of the bridge rectification circuit. A gas discharging lamp is connected between the two half-bridge output ends of the push-pull circuit through an AC constant current circuit. Thus, all functions of the ballast can be realized without electrolysis condenser. Compared with the prior art, the electronic ballast without electrolysis condenser has the advantages of long service life, small volume, high working temperature limit, stability, reliability, etc.
Description
Technical field
The utility model relates to a kind of electric ballast, and especially a kind of improvement of electric ballast belongs to the switch power technology field.
Background technology
Understand according to the applicant, common electric ballast has single tube topology, two-tube topology (push-pull type, two-tube semibridge system, double tube positive exciting formula, two-tube inverse-excitation type etc.), three pipe three-phase positive activation types, four pipe single-phase bridges or the like at present, wherein all needs to use electrochemical capacitor.This is because the capacitance per unit volume amount of electrochemical capacitor is big, price is low.
But electrochemical capacitor in nonpolarity non-electrolytic capacitor relatively after, can find the weakness of electrochemical capacitor, as: the life-span is short, heatproof is low, can not bear reverse voltage, bear overvoltage capabilities low, bear high peak current and the effective value current capacity is low, acid pollution is arranged, can not preserve for a long time etc.This makes it can't be adapted to " long-life ", " high temperature ", " pollution-free " in the application of power back-off circuit and is connected to the occasion that " high frequency content many power supply and loads " etc. has specific (special) requirements or high reliability request.
The utility model content
The purpose of this utility model is: at the shortcoming that above prior art adopts electrochemical capacitor to exist, propose a kind of stable and reliable for performance, and the no electrolytic capacitor electric ballast that the life-span is long, volume is little.
In order to reach above purpose, no electrolytic capacitor electric ballast of the present utility model comprises bridge rectifier, described bridge rectifier is in parallel with the push-pull circuit that current follow-up circuit and switching tube constitute, described current follow-up circuit connects gas discharge light fixture by exchanging constant-current circuit in order to the angle of flow of expansion bridge rectifier between the two half-bridge outputs of described push-pull circuit.
No electrolytic capacitor electric ballast of the present utility model further improves, and described bridge rectifier is parallel with nonpolarity non-electrolysis filter capacitor, can elimination burr clutter, further expand the angle of flow of bridge rectifier.
Like this, can realize all functions of ballast fully without electrochemical capacitor.Compared with prior art, have the life-span long, volume is little, the warm limit for height of working, advantage such as stable, reliable.
Description of drawings
Below in conjunction with accompanying drawing the utility model is further described.
Fig. 1 is the structural representation of an embodiment of the utility model.
Embodiment
Embodiment one
The no electrolytic capacitor electric ballast of present embodiment as shown in Figure 1, AC power enters the DX4 bridge rectifier through EMI em filtering and impulse disturbances absorption module, this bridge rectifier is in parallel with nonpolarity non-electrolysis filter capacitor C1, this electric capacity can elimination burr clutter, the angle of flow of expansion bridge rectifier.In addition, the current follow-up circuit that non-electrolytic capacitor C2, C3 and diode D5, D6, D7 constitute (promptly filling out paddy Passive Power compensation PPFC circuit) also is connected in parallel in the circuit, in order to further expand the angle of flow of bridge rectifier, make the power factor (PF) of source current surpass 90%.This current follow-up circuit, is met another diode D7 at two series connection mid points and constitutes respectively with after two diode D5, D7 connect with reverse order by two non-electrolytic capacitor C2, C3.Two couples of switching tube Q, Q constitute the push-pull circuit in parallel with the circuit other parts, meet gas discharge light fixture HID by the constant-current circuit that exchanges that is made of series capacitance CS and inductance L S between the two half-bridge outputs of this push-pull circuit.
During use, the symmetrical operation of half-bridge up and down of push-pull circuit, output current is lighted the gas discharge light fixture.Test shows, because fully without electrochemical capacitor, so the no electrolytic capacitor electric ballast life-span of present embodiment is long, volume is little, and working stability, reliable.
Claims (4)
1, a kind of no electrolytic capacitor electric ballast, comprise bridge rectifier, it is characterized in that: described bridge rectifier is in parallel with the push-pull circuit that current follow-up circuit and switching tube constitute, described current follow-up circuit connects gas discharge light fixture by exchanging constant-current circuit in order to the angle of flow of expansion bridge rectifier between the two half-bridge outputs of described push-pull circuit.
2, according to the described no electrolytic capacitor electric ballast of claim 1, it is characterized in that: described bridge rectifier is parallel with nonpolarity non-electrolysis filter capacitor.
3, according to the described no electrolytic capacitor electric ballast of claim 2, it is characterized in that: described current follow-up circuit, is connect another diode at two series connection mid points and constitutes respectively with after two diodes are connected with reverse order by two non-electrolytic capacitors.
4, according to the described no electrolytic capacitor electric ballast of claim 3, it is characterized in that: described interchange constant-current circuit is made of the electric capacity and the inductance of series connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201308566U CN201146627Y (en) | 2007-12-07 | 2007-12-07 | Electric ballast without electrochemical capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201308566U CN201146627Y (en) | 2007-12-07 | 2007-12-07 | Electric ballast without electrochemical capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201146627Y true CN201146627Y (en) | 2008-11-05 |
Family
ID=40083511
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201308566U Expired - Fee Related CN201146627Y (en) | 2007-12-07 | 2007-12-07 | Electric ballast without electrochemical capacitor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201146627Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103904878A (en) * | 2014-01-09 | 2014-07-02 | 常州隆辉照明科技有限公司 | Efficient power factor compensating circuit without switch |
-
2007
- 2007-12-07 CN CNU2007201308566U patent/CN201146627Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103904878A (en) * | 2014-01-09 | 2014-07-02 | 常州隆辉照明科技有限公司 | Efficient power factor compensating circuit without switch |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20110316 Granted publication date: 20081105 |
|
| PD01 | Discharge of preservation of patent |
Date of cancellation: 20110422 Granted publication date: 20081105 |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081105 Termination date: 20131207 |